Viscous Population Equilibria, Games and Economic Behavior
Viscosity in a biological population is the tendency of individuals to have a higher rate of interactions with their closer relatives than with similar numbers of more distantly related individuals. This paper presents a simple method of equilibrium analysis to predict the effect of viscosity in biological games. Taking the limit as viscosity goes to zero, a set of fluid population equilibria is defined. The set of fluid population equilibria is nonempty and includes all evolutionary stable strategies.
Jeroen Swinkels, Roger Myerson, Gregory B. Pollock
Swinkels, Jeroen, Roger Myerson, and Gregory B. Pollock. 1991. Viscous Population Equilibria. Games and Economic Behavior. 3: 101-109.